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iwlwifi: add missing rcu_read_lock

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commit 6db6340c42 upstream.

Using ieee80211_find_sta() needs to be under
RCU read lock, which iwlwifi currently misses,
so fix it.

Reported-by: Miles Lane <miles.lane@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Miles Lane <miles.lane@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johannes Berg
2010-06-07 21:20:38 +02:00
committed by Greg Kroah-Hartman
parent 40146189c7
commit ca2455ec06
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/iwlwifi/iwl-tx.c
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@@ -1198,6 +1198,7 @@ static void iwl_tx_status(struct iwl_priv *priv, struct sk_buff *skb)
struct ieee80211_sta *sta;
struct iwl_station_priv *sta_priv;
rcu_read_lock();
sta = ieee80211_find_sta(priv->vif, hdr->addr1);
if (sta) {
sta_priv = (void *)sta->drv_priv;
@@ -1206,6 +1207,7 @@ static void iwl_tx_status(struct iwl_priv *priv, struct sk_buff *skb)
atomic_dec_return(&sta_priv->pending_frames) == 0)
ieee80211_sta_block_awake(priv->hw, sta, false);
}
rcu_read_unlock();
ieee80211_tx_status_irqsafe(priv->hw, skb);
}